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Old 27th September 2019, 04:23 AM   #331
planet10 is offline planet10  Canada
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Optimum for the A10ms is even smaller than the A10.3.

dave
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Old 7th October 2019, 09:00 PM   #332
JamieMcC is offline JamieMcC  United Kingdom
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I've posted a pic or two before of my Bamboo micro fonkens before but had an interesting experiance today that I wanted to share I tried running them direct for the first time from a Chord Mojo portable headphone dac/amplifier.

I really wasnt expecting much but there is proper out of box floating imagining, sound is much better than you would expect for such a small desk top speaker. My four year old daugter has been wondering inbetween the speakers looking up confused at where the projected image is floating separate from the speakers.

Near field certanly helps with the experiance.

Its honestly nuts and a bit mind bending hearing whats coming out of these small 4" speakers hooked up to the Mojo.

Drivers are Scanspeak Discovery 10F/8414G10





Click the image to open in full size.
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Old 8th October 2019, 12:36 AM   #333
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Quote:
Originally Posted by JamieMcC View Post
...Bamboo micro fonkens ...
Drivers are Scanspeak Discovery 10F/8414G10
Original ĶFonken? The vent spacer could be a bit wider for these drivers, would give you a bit flatter more extended bass.

I could figure out how much.

Some of these small speakers are truly very good. My personal FF85wKeN and A5.2eN variations stun people when i put them in the big system. ďThere isnít a woofer hidden somewhere is there?Ē, as they walk around the speaker :^)

Iíve not yet heard the 10F/8414, just the /8424.

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Old 8th October 2019, 08:34 AM   #334
JamieMcC is offline JamieMcC  United Kingdom
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Hi Dave

I'm genuinely surprised at the results the drivers are 86.6 dB the enclosure design is for a different driver (FF85K) and Mojo output is only 720mW @ 8 Ohms so very much a odd ball combination.

The enclosure was made using some Ikea bamboo chopping boards for my daughters room. Opening up the vent spacer so it spans the full width of the box would be something I could try but is not high on the to do list.

I used the planet 10 design in the link below as a 2 litre cabinet size was suggested for the 10F/8414 I had good results with a lager Fonken Fostex FX120 build and the MicroFonken looked cute.

http://p10hifi.net/tlinespeakers/FAL...en-0v9-map.pdf

Considering the build cost was around £130 for the pair of speakers + £299 of the Mojo as a dac/amp feed by Roon it would make for a very nice sounding set up for a small room or desk top system.

The results really have left me scratching my head and being more intrigued than ever by the increasing reports of the Chord Hugo2, TT2 and Dave dacs driving speakers like the Omega Super Alnico Monitors directly off of their dac sections and forgoing using a traditional separate amplifer.

I'm probably very close to a point where this is a route I will explore further with another build for a main system specifically purchasing a higher end Chord dac for.

Hugo 2 @ 1W RMS 8Ω
TT2 @ 7.3 W RMS 8Ω single ended.
TT2 @18W RMS 8Ω Balanced
Dave 2W RMS 8Ω (I think)
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Old 8th October 2019, 12:32 PM   #335
JamieMcC is offline JamieMcC  United Kingdom
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My other half has been sat listening to some music with me for the last half hour the speakers are positioned as in the pic. I asked her if she knew which speakers the sound was coming out of she couldnt decide

I said the small ones she said "no way, oh my god really!"






Click the image to open in full size.[/QUOTE]
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Old 8th October 2019, 06:09 PM   #336
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Quote:
Originally Posted by JamieMcC View Post
Opening up the vent spacer so it spans the full width of the box would be something I could try but is not high on the to do list.
removing the vent spacer would be a supreme PITA. To tune lower you need to decrease its cross-section area by adding more spacer. this is fairly easy.

Quote:
I used the planet 10 design in the link below as a 2 litre cabinet size was suggested for the 10F/8414
OK. I have the larger 2.5 litre microPlus enclosure in my sims and that is what i was looking at. For the 2 litre version the amount of tuning difference is even greater, but the soze of the bump is not much higher than in the mistuned 2.5 litre box.

Offer still stands, i can figure out how much vent spacer to add. This can at 1st be done temporarily to see if you like the result.

dave
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Old 8th October 2019, 06:49 PM   #337
JamieMcC is offline JamieMcC  United Kingdom
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Dave if its really not going to be to much trouble then that would be great thank you.

Adding some material to the vent spacer would certainly be easy to try and interesting to see what effect it has.
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Old 8th October 2019, 07:07 PM   #338
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The vent spacer should go from 16mm wide to 33 mm wide. Typically you would add half of the difference (8.5mm) to each side of the outside walls or on either side of the vent spacer.

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Old 8th October 2019, 07:17 PM   #339
JamieMcC is offline JamieMcC  United Kingdom
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Thats super 8.5mm is a good number to work with I have some 9mm mdf in the garage a run over with the orbital sander will quickly take a strip down to 8.5mm and making it a tight push fit in the gap will make the modification pretty painless to try.

Very much apreciated the tuning advice.

Jamie
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Old 8th October 2019, 07:18 PM   #340
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Let us know what you find.

dave
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